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The 2026 Mustang RTR Spec 5 is a new production car from RTR, limited to just 50 units for the 2026 model year. The main advantages include: A supercharged 5.0 V8 engine, with over 870 horsepower and 860 lb-ft of torque, and a fully integrated widebody system exclusive to the Spec 5 with exposed carbon fiber components.

“As RTR has grown over the years, so has our design and engineering capabilities thanks to special projects and motorsport experience, " says founder Vaughn Gittin Jr. "Spec 5 doesn't reference our competitors - it comes from our core RTR DNA. This Mustang embodies everything that what we stand for – confidence, ability and our ‘Ready to Rock’ mentality.”
At the heart of the Spec 5 is a supercharged five-liter V8 engine paired with a three-liter Stage 2 Whipple Supercharger System, which delivers over 870 horsepower and 860 lb-ft of torque and is mated to either a six-speed manual or ten-speed automatic transmission.


The Spec 5 is the first Mustang from RTR to use a complete widebody kit - the extended carbon and composite fenders perfectly follow the original body lines of the Mustang S650. Each part has not only an aesthetic but also a functional role - improving downforce, cooling and aerodynamics. Of course, there is also the typical RTR LED daytime running lights in the radiator grille.
The RTR Aero 5 Evo forged wheels are available in Forged Charcoal, Podium Champagne and Vapor Silver.
Michelin Pilot Sport 4S tires – 305/30R20 on a 10.5" wheel at the front and 315/30R20 on an 11" wheel at the rear maximize grip and everyday handling.
Every Mustang RTR Spec 5 owner has the option to customize their car with a standard color from the expanded RTR color palette, which is included in the base price, or enhance it with premium colors and sample painting for a truly custom design.
